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The study was published in The Journal Of Nutrition, and looked at 163 adults aged 25-45 over 12 weeks. Half were given daily avocado in their diets, half weren't. The subjects didn't change their diets otherwise.
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The avocado-a-day group turned out to have flourishing gut microbiomes — the collection of bacteria in your gut that break down food and keep your digestion humming along.
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The people who'd got a dose of the green stuff daily saw an increase in the diversity of their gut microbiome, as well as a growth in the bacteria that could break down fiber, which is notoriously tough on the gut.
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The avocados also seemed to feed gut bacteria like Lachnospira and Alistipes, which are linked to kidney health and liver function; the avocado eaters had between 26% and 65% more of them than the control group.
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Avocado has been known to be a health food for a while — studies show it lowers cholesterol and boosts healthy fat levels — but this is the first study to show it's good for the gut, too.
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A well-functioning gut is a key part of health. Your gut microbiome can influence everything from your appetite to your immune system, and even your mental wellness.